Adamw Posted October 2, 2020 Report Share Posted October 2, 2020 Try this, it should be closer. Need another log from cold to hot to dial in the base position. Test5.pclx Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 2, 2020 Author Report Share Posted October 2, 2020 3 hours ago, Adamw said: Try this, it should be closer. Need another log from cold to hot to dial in the base position. Test5.pclx 385.05 kB · 1 download I'll try it. I'll log tomorrow morning. Thanks. Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 3, 2020 Author Report Share Posted October 3, 2020 (edited) Hi... I've logged this morning on (not too) cold start. It had a little idle hunt after start then went stable. When AC was turned on also a bit of hunting then went stable. I adjusted the Idle Actuator startup hold time & startup decay time - it seems to solve the idle hunt from after starting. I also fine adjusted some parameters (ISC Control TPS lockout to 2%), and transient ignition retard down to just -5 for 500 to 1000rpm - as the idle dips too much before responding to throttle press. I guess this will do for now, and I think I can now do some street tune. Thanks! Edited October 4, 2020 by essb00 Attachment deleted. Need space to attach more items Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 3, 2020 Report Share Posted October 3, 2020 The oscillation is mostly due to something wrong with your AC request switch, it is initially bouncing on/off - which consequential adds/removes the AC step. After the switch settles down the idle comes right. Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 3, 2020 Author Report Share Posted October 3, 2020 2 minutes ago, Adamw said: The oscillation is mostly due to something wrong with your AC request switch, it is initially bouncing on/off - which consequential adds/removes the AC step. After the switch settles down the idle comes right. Oh... I guess something is wrong with my AC switch. That's why I thought I heard the relay clicking... Thanks. I'll be having to sort that switch out, otherwise change it. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 3, 2020 Report Share Posted October 3, 2020 before you go buying parts, can you just measure voltage at the ecu AC request pin with the switch on and off. It is possibly just sitting right on the threshold. Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 4, 2020 Author Report Share Posted October 4, 2020 Confirmed, it was the AC switch. I had it fixed, now AC request is stable. I had some more fine adjustments, idle seems to be stable now both AC on & off. Only thing though is while driving, the idle dips after throttle release <-- this I need to log. Test7.pclx PC Datalog - 2020-10-4 2;52;36 pm.llgx Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 5, 2020 Author Report Share Posted October 5, 2020 I have wired headlight switch and AC blowers switch as ELS (electrical load switch) to GP Idle Offset in Idle Speed Control. Now idle does not dip anymore after throttle is released. Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 20, 2020 Author Report Share Posted October 20, 2020 I finally got to capture the idle hiccups whenever aircon is on. If you'd notice on the log, the injector duty cycle suddenly dips right after the batt voltage dips. There are no recorded trigger error(s). Any more ideas @Adamw? Thanks. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 20, 2020 Report Share Posted October 20, 2020 I dont see where the injector duty suddenly drops? What causes the drop in battery voltage and increase in map at the 0.2 and 11.6 second mark? Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 21, 2020 Author Report Share Posted October 21, 2020 On this attached time plot, the battery voltage suddenly dipped and the injector duty cycle momentarily followed suit. The MAP increased as the engine speed dropped. I tried to change the connection of the wire main relay supplying power for the ECU & related ancillaries (injectors/igniter/ignition coil/IACV/lambda controller) but it still has the hiccup. The voltage from the distribution block does not seem to dip as such. I also have tried your recommendation to temporarily remove the Mallory Hyfire 6EZL and just use the stock ignition coil --- still having the hiccups only when AC is on. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 21, 2020 Report Share Posted October 21, 2020 The change in duty cycle is due to the 200rpm drop in engine speed. If you look at the inj PW you will see it actually increases - less duty cycle doesnt mean less fuel - you just have more off time between squirts so duty cycle is shorter. The drop in battery voltage is too sharp to be caused by the small dip in RPM. The dip in RPM and MAP is caused by whatever is causing the dip in battery voltage, not the other way around. I dont know if it is electrical load from say a rear demister or a short or something - or a bad main power connection, but whatever it is you need to solve whatever is causing the battery voltage issue. Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 21, 2020 Author Report Share Posted October 21, 2020 Here, the alternator is disconnected (running solely on battery power) - there is no noticeable voltage dip but still having that hiccup though less noticeable as the RPM is higher. Quote Link to comment Share on other sites More sharing options...
essb00 Posted November 28, 2020 Author Report Share Posted November 28, 2020 Hi @Adamw Just to let you know, since I updated to the latest firmware 6.19.37, the hiccups has not recurred yet. I have not changed anything other than update PCLink software and update ECU firmware. ...so it seemed that the hiccups I was having were caused by some sort of bug in the last firmware.https://drive.google.com/file/d/17xGlqKqUqD7hvB8ZJjuTrurAxadN_L_R/view?usp=sharinghttps://drive.google.com/file/d/1S-yKHXDysRuVF6izpmLn-6kmsAxg4J-h/view?usp=sharing Quote Link to comment Share on other sites More sharing options...
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